AI agents call gmail_list_drafts to retrieve information from Sage MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves draft messages from Gmail. It is a read-only operation with no side effects—it does not create, modify, delete, or send messages. The blast radius is minimal since viewing draft messages does not expose actual production data beyond what the authenticated user already has access to.
From the tool's definition Tool name 'gmail_list_drafts' and description 'List draft messages in the user' indicate a retrieval operation that queries existing draft messages without modifying or deleting them.
Documented attack patterns abuse exactly the kind of access gmail_list_drafts gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Sage MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for gmail_list_drafts:
{
"version": "1",
"default": "deny",
"tools": {
"gmail_list_drafts": {}
}
}gmail_list_drafts is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List draft messages in the user. It is categorised as a Read tool in the Sage MCP MCP Server, which means it retrieves data without modifying state.
Register the Sage MCP server in PolicyLayer and add a rule for gmail_list_drafts: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Sage MCP. Nothing to install.
gmail_list_drafts is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the gmail_list_drafts rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for gmail_list_drafts. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
gmail_list_drafts is provided by the Sage MCP server (sagemcp/sagemcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 359 Sage MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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359 Sage MCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.